This document provides a humorous recipe for an "Indus River Valley Cake" that uses ingredients representing key aspects of ancient Indus River Valley civilization such as rich soil, the Indus River, Aryan people, monsoons, the Harappan people, advanced plumbing in Mohenjo-Daro, mud bricks, Hinduism, rice agriculture, livestock including sheep and goats, the developing caste system, unpredictable monsoon rivers, and the undeciphered Harappan language.